ghsa-6m52-8r59-r63x
Vulnerability from github
Published
2025-12-24 15:30
Modified
2025-12-24 15:30
Details

In the Linux kernel, the following vulnerability has been resolved:

erofs: stop parsing non-compact HEAD index if clusterofs is invalid

Syzbot generated a crafted image [1] with a non-compact HEAD index of clusterofs 33024 while valid numbers should be 0 ~ lclustersize-1, which causes the following unexpected behavior as below:

BUG: unable to handle page fault for address: fffff52101a3fff9 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffed067 P4D 23ffed067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4398 Comm: kworker/u5:1 Not tainted 6.3.0-rc6-syzkaller-g09a9639e56c0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Workqueue: erofs_worker z_erofs_decompressqueue_work RIP: 0010:z_erofs_decompress_queue+0xb7e/0x2b40 ... Call Trace: z_erofs_decompressqueue_work+0x99/0xe0 process_one_work+0x8f6/0x1170 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30

Note that normal images or images using compact indexes are not impacted. Let's fix this now.

[1] https://lore.kernel.org/r/000000000000ec75b005ee97fbaa@google.com

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54132"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: stop parsing non-compact HEAD index if clusterofs is invalid\n\nSyzbot generated a crafted image [1] with a non-compact HEAD index of\nclusterofs 33024 while valid numbers should be 0 ~ lclustersize-1,\nwhich causes the following unexpected behavior as below:\n\n BUG: unable to handle page fault for address: fffff52101a3fff9\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 23ffed067 P4D 23ffed067 PUD 0\n Oops: 0000 [#1] PREEMPT SMP KASAN\n CPU: 1 PID: 4398 Comm: kworker/u5:1 Not tainted 6.3.0-rc6-syzkaller-g09a9639e56c0 #0\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023\n Workqueue: erofs_worker z_erofs_decompressqueue_work\n RIP: 0010:z_erofs_decompress_queue+0xb7e/0x2b40\n ...\n Call Trace:\n  \u003cTASK\u003e\n  z_erofs_decompressqueue_work+0x99/0xe0\n  process_one_work+0x8f6/0x1170\n  worker_thread+0xa63/0x1210\n  kthread+0x270/0x300\n  ret_from_fork+0x1f/0x30\n\nNote that normal images or images using compact indexes are not\nimpacted.  Let\u0027s fix this now.\n\n[1] https://lore.kernel.org/r/000000000000ec75b005ee97fbaa@google.com",
  "id": "GHSA-6m52-8r59-r63x",
  "modified": "2025-12-24T15:30:39Z",
  "published": "2025-12-24T15:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54132"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/060fecf1114ff9fcfe87953fe8c4fc5048777160"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a4579cd6e4936de107c82499c3c9ee11b63401e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ee7a86e28ce9ead7112286c388df8d254c373c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/880c79bdb002b9d5b6940e52c2ad3829c2178207"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96a845419b3722869f09883319de4d55c44d9aef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc4efd3dd2ac9f89143e5d881609747ecff04164"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f01b2894928affa3339d355608713cf3db8360b8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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